From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ee0-f52.google.com (mail-ee0-f52.google.com [74.125.83.52]) by kanga.kvack.org (Postfix) with ESMTP id 908296B0035 for ; Sun, 2 Mar 2014 03:22:04 -0500 (EST) Received: by mail-ee0-f52.google.com with SMTP id c41so3300146eek.11 for ; Sun, 02 Mar 2014 00:22:03 -0800 (PST) Received: from atrey.karlin.mff.cuni.cz (atrey.karlin.mff.cuni.cz. [195.113.26.193]) by mx.google.com with ESMTP id 46si13429232eem.130.2014.03.02.00.22.01 for ; Sun, 02 Mar 2014 00:22:01 -0800 (PST) Date: Sun, 2 Mar 2014 09:22:00 +0100 From: Pavel Machek Subject: Re: [PATCH v6 00/22] Support ext4 on NV-DIMMs Message-ID: <20140302082159.GA27716@amd.pavel.ucw.cz> References: <1393337918-28265-1-git-send-email-matthew.r.wilcox@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1393337918-28265-1-git-send-email-matthew.r.wilcox@intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Matthew Wilcox Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, willy@linux.intel.com On Tue 2014-02-25 09:18:16, Matthew Wilcox wrote: > One of the primary uses for NV-DIMMs is to expose them as a block device > and use a filesystem to store files on the NV-DIMM. While that works, > it currently wastes memory and CPU time buffering the files in the page > cache. We have support in ext2 for bypassing the page cache, but it > has some races which are unfixable in the current design. This series > of patches rewrite the underlying support, and add support for direct > access to ext4. > > This iteration of the patchset renames the "XIP" support to "DAX". > This fixes the confusion between kernel XIP and filesystem XIP. It's not > really about executing in-place; it's about direct access to memory-like > storage, bypassing the page cache. DAX is TLA-compliant, retains the > exciting X, is pronouncable ("Dacks") and is not used elsewhere in > the kernel. The only major use of DAX outside the kernel is the German > stock exchange, and I think that's pretty unlikely to cause > confusion. It is TLA compliant, but not widely understood, and probably not googleable. Could we perhaps use some longer name for a while? > create mode 100644 Documentation/filesystems/dax.txt Its not like filename can't be longer than 3.3, you see? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org